Manufacture of type-bars



(No mom.

W. BAKER.

MANUFACTURE OF TYPE BARS.

No. 392,177. Patented Nov. 6, 1888.

Tlfdnasses N. PETERS, ihoIo-Ulhagnpher. Washingmm 11cv UNITED STATES PATENT EEIcE.

MANUFACTURE OF TYPE-BARS.

SPECIFICATION forming part of Letters Patent No. 392,177, dated November 6, 1888.

Application filed July 30, 1888. Serial No. 281,375. (No model.)

To all wliom it may concern.-

Be it known that I, VVALTER BAKER, of llion, in the county of Herkimer and State of New York, haveinvented certain new and useful Improvements in Type-Bars and Method of Manufacturing Same, of which the following is a specification. 7

My invention relates to type-writing machines; and it consists in a novel construction of the typebars thereof, as hereinafter more fully set forth.

In the accompanying drawings, Figure 1 is a perspective view of one of the blanks from which the bar is formed; Figs. 2, 3, and 4,views of the bar in different stages of manufacture; Fig. 5, a perspective view of the completed bar, and Fig. 6 a perspective view of a modified form of bar.

In the manufacture of type-bars for this class of machines it has been proposed to cut them out of sheet metal, and after bending them into proper form to solder or otherwise secure to the bar blocks to receive the type or printing-character and the j ournals upon which the bar oscillates. In some cases these bars have been forged from a solid bar drawn out and worked into proper shape; but such plan is long and tedious, requires skilled workmen, and does not insure the uniformity in size and strength required. Other plans have also been tried ;but all are open to the objection that the bars spring or yield and soon get out of alignment, wear unevenly in their bearings, and are expensive to manufacture. To overcome these objections is the object of my invention, which is carried out in the following manner:

I first take a sheet of steel about one eighth of an inch (more or less) in thickness and stamp or cut therefrom a number of bar-blanks, A, of the-form shown in Fig. 1, the said blanks A comprising a main arm, a, lateral arms I) I), a tail, 0, and a head, d. The blank thus out or stamped out is then placed in a die and the tail 0 bent upward at an angle to the main body or arm a, as shown in Fig. 2. When thus bent, the blank is placed in suitably-prepared dies and is swaged so as to present the appearance indicated in Fig. 3. This operation compresses the arm a laterally, gives shape to the head (I and the arms b b, and flattens the tail 0. The ends of the arms 6 b are also indented during this operatipn to facilitate the centering of the drill used in boring. When the blank emerges from this last operation, it will have a feather or spur along its longitudinal axis, as shown in Fig. 3, and after this is removed by means of any suitable devices the blank presents the appearance represented in Fig. 4.

Upon reference to Figs. 5 and 6 it will be noticed that the main arm a is'fluted longitudinally, which fiuting may be done at the third or fourth operation, as may be preferred. The fluting renders the bar more ornamental in appearance and better adapted to sustain the strains to which it is subjected. A hole, e, is drilled through the head (i to receive the type or other printing-character, and a similar hole, f, is drilled through the flattened tail 0 to receive the link through or by means of which the key-bar operates the type-bar. As also shown in said figures, a hole, 9, is drilled through the arms I) b in line with the axis of said arms to receive the axle or pin upon which the type-bar is hung.

A type-bar constructed as herein described is cheap and simple in construction and practically unyielding, thereby insuring true alignment.

In Fig. 6 the form of bar is modified somewhat, the pivotal end of the bar being without lateral journals or arms. It will be noticed, however, that the flutings or indentations in the sides of the bar extend rearwardly a considerable distance, and that a raised rim is formed along near the edge of the bar nearits pivot. By making the bar in this form there is only a very small portion of the side face bears or rubs against the side walls of the slot in which it is hung, therebyreducing the friction, and at the same time making the bar strong and more ornamental.

I am aware that it is not new to make various articles by subjecting a blank to the successive action of dies; but I am not aware that any one has ever before employed this method in the manufacture of type-bars, nor has any one, so far as I am aware, ever before produced type-bars possessing the uniformity in size and strength secured by bars constructed in accordance with my invention.

Having thus described my invention,what I claim is- 1. The herein-described method of forming type-bars for type-writing machines, which consists in first punching a blank from a sheet or plate of metal, next bending the tail at an angle to the body, next subjecting the blank to pressure to give proper form and size to the various parts, (these operations being performed by means of dies,) and finally removing the burr produced by the dies.

2. The herein-described method of forming type-bars for type-writing machines, which consists in punching a blank from a sheet or plate of metal, bending the tail thereof in dies to a given angle with the body, compressing the metal in dies to give form and size to the hubs, head, tail, and body, removing the burrs or fins produced by the dies, and finally drilling the hubs, head, and tail.

The improvement in the manufacture of 20 typebars for type-writing machines, which consists of the following steps, to wit: first, cutting the blank'from a sheet of metal so as to form a main arm, a, lateral arms I) I), tail 1:,

and head (I; second, bending the tail at an angle to the main arm; third, compressing the bar in dies to give the desired form,and,fourth, finishing and drilling.

4. The improvement in the method of manufacturing type-bars, which consists in cutting out a blank of the desired form, then bending its tail upward, as represented in Fi 2, and subsequently subjecting the bar to the action of dies and trimming and finishing.

5. A type-bar for type-writing machines, having longitudinally-grooved sides, substair tially as shown and described.

6. A blank for the manufacture of type-bars, comprising the main stem or body a, lateral bosses or hub portions 1) b, tail portion 0, and head d.

In witness whereof I hereunto set my hand in the presence of two witnesses.

\VALTER EAKER. Witnesses:

GEORGE O. RASHAUH, ANDREW J. Cxnmon. 

